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# -*- coding: binary -*-
require 'tempfile'
require 'spec_helper'
require 'packetfu'
require_relative 'file_spec_helper'
module PacketFu
module PcapNG
describe File do
before(:all) do
@file = ::File.join(__dir__, '../..', 'test', 'sample.pcapng')
@file_spb = ::File.join(__dir__, '../..', 'test', 'sample-spb.pcapng')
end
before(:each) { @pcapng = File.new }
context '#readfile' do
it 'reads a Pcap-NG file' do
@pcapng.readfile @file
expect(@pcapng.sections.size).to eq(1)
expect(@pcapng.sections[0].unknown_blocks.size).to eq(0)
expect(@pcapng.sections.first.interfaces.size).to eq(1)
intf = @pcapng.sections.first.interfaces.first
expect(intf.section).to eq(@pcapng.sections.first)
expect(intf.packets.size).to eq(11)
packet = intf.packets.first
expect(packet.interface).to eq(intf)
end
it 'reads a Pcap-NG file with Simple Packet blocks' do
@pcapng.readfile @file_spb
expect(@pcapng.sections.size).to eq(1)
expect(@pcapng.sections[0].unknown_blocks.size).to eq(0)
expect(@pcapng.sections.first.interfaces.size).to eq(1)
intf = @pcapng.sections.first.interfaces.first
expect(intf.section).to eq(@pcapng.sections.first)
expect(intf.packets.size).to eq(4)
expect(intf.snaplen.to_i).to eq(0)
packet = intf.packets.first
expect(packet.interface).to eq(intf)
expect(packet.data.size).to eq(packet.orig_len.to_i)
end
it 'yields xPB object per read packet' do
idx = 0
@pcapng.readfile(@file) do |pkt|
expect(pkt).to be_a(PcapNG::EPB)
idx += 1
end
expect(idx).to eq(11)
end
it 'reads many kinds of pcapng file' do
[:little, :big].each do |endian|
base_dir = ::File.join(__dir__, '..', '..', 'test', 'pcapng-test',
endian == :little ? 'output_le' : 'output_be')
PCAPNG_TEST_FILES.each do |file, sections|
next if file == 'difficult/test202.pcapng'
@pcapng.clear
@pcapng.readfile ::File.join(base_dir, file)
expect(@pcapng.sections[0].endian).to eq(endian)
expect(@pcapng.sections.size).to eq(sections.size)
sections.each_with_index do |section, i|
expect(@pcapng.sections[i].unknown_blocks.size).to eq(section[:unknown])
expect(@pcapng.sections[i].interfaces.size).to eq(section[:idb])
packets = @pcapng.sections[i].interfaces.map(&:packets).flatten
expect(packets.grep(EPB).size).to eq(section[:epb])
expect(packets.grep(SPB).size).to eq(section[:spb])
end
end
end
end
it 'reads a file with different sections, with different endians' do
sections = PCAPNG_TEST_FILES['difficult/test202.pcapng']
[:little, :big].each do |endian|
other_endian = endian == :little ? :big : :little
base_dir = ::File.join(__dir__, '..', '..', 'test', 'pcapng-test',
endian == :little ? 'output_le' : 'output_be')
@pcapng.clear
@pcapng.readfile ::File.join(base_dir, 'difficult', 'test202.pcapng')
expect(@pcapng.sections.size).to eq(sections.size)
expect(@pcapng.sections[0].endian).to eq(endian)
expect(@pcapng.sections[1].endian).to eq(other_endian)
expect(@pcapng.sections[2].endian).to eq(endian)
sections.each_with_index do |section, i|
expect(@pcapng.sections[i].unknown_blocks.size).to eq(section[:unknown])
expect(@pcapng.sections[i].interfaces.size).to eq(section[:idb])
@pcapng.sections[i].unknown_blocks.each do |block|
expect(block.endian).to eq(@pcapng.sections[i].endian)
end
@pcapng.sections[i].interfaces.each do |interface|
expect(interface.endian).to eq(@pcapng.sections[i].endian)
interface.packets.each do |packet|
expect(packet.endian).to eq(@pcapng.sections[i].endian)
end
end
packets = @pcapng.sections[i].interfaces.map(&:packets).flatten
expect(packets.grep(EPB).size).to eq(section[:epb])
expect(packets.grep(SPB).size).to eq(section[:spb])
end
end
end
end
context '#read_packets' do
before(:all) do
@expected = [UDPPacket] * 2 + [ICMPPacket] * 3 + [ARPPacket] * 2 +
[TCPPacket] * 3 + [ICMPPacket]
end
it 'returns an array of Packets' do
packets = @pcapng.read_packets(@file)
expect(packets.map(&:class)).to eq(@expected)
icmp = packets[2]
expect(icmp.ip_saddr).to eq('192.168.1.105')
expect(icmp.ip_daddr).to eq('216.75.1.230')
expect(icmp.icmp_type).to eq(8)
expect(icmp.icmp_code).to eq(0)
end
it 'yields Packet object per read packet' do
idx = 0
@pcapng.read_packets(@file) do |pkt|
expect(pkt).to be_a(@expected[idx])
idx += 1
end
expect(idx).to eq(11)
end
end
context '#file_to_array' do
it 'generates an array from object state' do
@pcapng.readfile @file
ary = @pcapng.file_to_array
expect(ary).to be_a(Array)
ary.each do |p|
expect(p).to be_a(String)
end
expect(ary[0]).to eq(@pcapng.sections[0].interfaces[0].packets[0].data)
end
it 'generates an array from given file, clearing object state' do
@pcapng.readfile @file
ary = @pcapng.file_to_array(filename: @file_spb)
expect(@pcapng.sections.size).to eq(1)
expect(@pcapng.sections[0].interfaces[0].packets[0]).to be_a(SPB)
expect(ary).to be_a(Array)
ary.each do |p|
expect(p).to be_a(String)
end
expect(ary[0]).to eq(@pcapng.sections[0].interfaces[0].packets[0].data)
end
it 'generates an array with timestamps' do
@pcapng.readfile @file
ary = @pcapng.file_to_array(keep_timestamps: true)
expect(ary).to be_a(Array)
ary.each do |p|
expect(p).to be_a(Hash)
expect(p.keys.first).to be_a(Time)
expect(p.values.first).to be_a(String)
end
packet1 = @pcapng.sections[0].interfaces[0].packets[0]
expect(ary[0].keys.first).to eq(packet1.timestamp)
expect(ary[0].values.first).to eq(packet1.data)
end
end
context '#to_file' do
before(:each) { @write_file = Tempfile.new('pcapng') }
after(:each) { @write_file.close; @write_file.unlink }
it 'creates a file and write self to it' do
@pcapng.readfile @file
@pcapng.to_file :filename => @write_file.path
@write_file.rewind
expect(@write_file.read).to eq(::File.read(@file))
end
it 'appends a section to an existing file' do
@pcapng.readfile @file
@pcapng.to_file :filename => @write_file.path
@pcapng.to_file :filename => @write_file.path, :append => true
@pcapng.clear
@pcapng.readfile @write_file.path
expect(@pcapng.sections.size).to eq(2)
expect(@pcapng.sections[0].to_s).to eq(@pcapng.sections[1].to_s)
end
end
context '#array_to_file' do
before(:each) do
tmpfile = Tempfile.new('packetfu')
@tmpfilename = tmpfile.path
tmpfile.close
tmpfile.unlink
end
after(:each) { ::File.unlink @tmpfilename if ::File.exist? @tmpfilename }
it 'gets an array of Packet objects' do
packets = @pcapng.read_packets(@file)
@pcapng.clear
@pcapng.array_to_file(packets)
@pcapng.write @tmpfilename
@pcapng.clear
packets2 = @pcapng.read_packets(@tmpfilename)
expect(packets2.map(&:to_s).join).to eq(packets.map(&:to_s).join)
end
it 'gets a hash containing an array of Packet objects' do
packets = @pcapng.read_packets(@file)[0..1]
@pcapng.clear
@pcapng.array_to_file(:array => packets)
@pcapng.write @tmpfilename
@pcapng.clear
packets2 = @pcapng.read_packets(@tmpfilename)
expect(packets2.map(&:to_s).join).to eq(packets.map(&:to_s).join)
end
it 'gets a hash containing an array of Packet objects and a :timestamp key' do
packets = @pcapng.read_packets(@file)[0..1]
@pcapng.clear
@pcapng.array_to_file(:array => packets,
:timestamp => Time.utc(2000, 1, 1),
:ts_inc => 3600*24)
@pcapng.write @tmpfilename
@pcapng.clear
@pcapng.readfile(@tmpfilename)
@pcapng.sections[0].interfaces[0].packets.each_with_index do |pkt, i|
expect(pkt.data).to eq(packets[i].to_s)
expect(pkt.timestamp).to eq(Time.utc(2000, 1, 1+i))
end
end
it 'gets a hash containing couples of Time and Packet objects' do
packets = @pcapng.read_packets(@file)[0..3]
timestamp = Time.utc(2000, 1, 1)
ts_inc = 3600*24 * 2
array = []
packets.each_with_index do |pkt, i|
array << { (timestamp + ts_inc * i) => pkt }
end
@pcapng.clear
@pcapng.array_to_file(:array => array)
@pcapng.write @tmpfilename
@pcapng.clear
@pcapng.readfile(@tmpfilename)
@pcapng.sections[0].interfaces[0].packets.each_with_index do |pkt, i|
expect(pkt.data).to eq(packets[i].to_s)
expect(pkt.timestamp).to eq(Time.utc(2000, 1, 1+2*i))
end
end
it 'gets a hash containing a :filename key' do
packets = @pcapng.read_packets(@file)[0..2]
@pcapng.clear
@pcapng.array_to_file(:array => packets, :filename => @tmpfilename)
@pcapng.clear
packets2 = @pcapng.read_packets(@tmpfilename)
expect(packets2.map(&:to_s).join).to eq(packets.map(&:to_s).join)
end
end
it '#to_s returns object as a String' do
orig_str = PacketFu.force_binary(::File.read(@file))
@pcapng.read orig_str
expect(@pcapng.to_s).to eq(orig_str)
@pcapng.clear
orig_str = PacketFu.force_binary(::File.read(@file_spb))
@pcapng.read orig_str
expect(@pcapng.to_s).to eq(orig_str)
end
end
end
end
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